Hi Jagan,
thanks for picking this up again and sending a new version.
Am Freitag, 8. April 2022, 18:20:57 CEST schrieb Jagan Teki:
This series supports common bridge support for Samsung MIPI DSIM which is used in Exynos and i.MX8MM SoC's.
Previous RFC can be available here [1].
The final bridge supports both the Exynos and i.MX8MM DSI devices.
On, summary this patch-set break the entire DSIM driver into
- platform specific glue code for platform ops, component_ops.
- common bridge driver which handle platform glue init and invoke.
Patch 0000: Samsung DSIM bridge
Patch 0001: platform init flag via driver_data
Patch 0002/9: bridge fixes, atomic API's
Patch 0010: document fsl,imx8mm-mipi-dsim
Patch 0011: add i.MX8MM DSIM support
Tested in Engicam i.Core MX8M Mini SoM.
Anyone interested, please have a look on this repo [2]
[2] https://github.com/openedev/kernel/tree/imx8mm-dsi-v1 [1] https://lore.kernel.org/linux-arm-kernel/YP2j9k5SrZ2%2Fo2%2F5@ravnborg.org/ T/
Any inputs?
With the following patch I can use LVDS, connected via an LVDS bridge on my TQMa8MxML + MBa8Mx. Unless I enable 4 MIPI-DSI lanes. Using "data-lanes = <1 2 3 4>;" instead show a flickering image, but the "content" seems ok. On the downstream kernel MIPI-DSI is working, apparently using 4-lanes. On the first glance a bigger difference to the downstream kernel from NXP is that AFAICS they change the clocks depending on the currently selected mode [1]. I tried playing with the clocks but I don't fully grasp which clock has which effect, so I eventually had no results. Any ideas what might be wrong here?
On a side note, might be completely unrelated to this series, I get the following warning as well:
sn65dsi83 2-002d: Unsupported LVDS bus format 0x100a, please check output
bridge driver. Falling back to SPWG24.
0x100a is MEDIA_BUS_FMT_RGB888_1X24 from samsung_dsim_atomic_get_input_bus_fmts(). For some reason this is propagates to the output_bus_cfg used in sn65dsi83_atomic_enable(). I would have expected this is MEDIA_BUS_FMT_RGB888_1X7X4_SPWG from "tianma,tm070jvhg33" display.
Best regards, Alexander
[1] https://source.codeaurora.org/external/imx/linux-imx/tree/drivers/gpu/drm/ bridge/sec-dsim.c?h=lf-5.10.72-2.2.0#n1255
Here is my patch for the DT --->8--- diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/ freescale/Makefile index 52ce0f798657..7dd280b45681 100644 --- a/arch/arm64/boot/dts/freescale/Makefile +++ b/arch/arm64/boot/dts/freescale/Makefile @@ -58,6 +58,11 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-icore-mx8mm-edimm2.2.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-n801x-s.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-nitrogen-r2.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-tqma8mqml-mba8mx.dtb + +tqma8mqml-mba8mx-imx327-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml- mba8mx-imx327.dtbo +tqma8mqml-mba8mx-lvds-dtbs += imx8mm-tqma8mqml-mba8mx.dtb imx8mm-tqma8mqml- mba8mx-lvds.dtbo +dtb-$(CONFIG_ARCH_MXC) += tqma8mqml-mba8mx-imx327.dtb tqma8mqml-mba8mx- lvds.dtb + dtb-$(CONFIG_ARCH_MXC) += imx8mm-var-som-symphony.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw71xx-0x.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x.dtb diff --git a/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx-lvds.dts b/ arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx-lvds.dts new file mode 100644 index 000000000000..8c743d291459 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx-lvds.dts @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) +/* + * Copyright 2021-2022 TQ-Systems GmbH + */ + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "tq,imx8mm-tqma8mqml-mba8mx", "tq,imx8mm-tqma8mqml", "fsl,imx8mm"; +}; + +&backlight_lvds0 { + status = "okay"; +}; + +&dsi { + status = "okay"; + + ports { + port@1 { + mipi_dsi_out: endpoint { + remote-endpoint = <&lvds_bridge_in>; + }; + }; + }; +}; + +&dsi_lvds_bridge { + status = "okay"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + lvds_bridge_in: endpoint { + data-lanes = <1 2 3>; + remote-endpoint = <&mipi_dsi_out>; + }; + }; + }; +}; + +&expander0 { + dsi-mux-oe-hog { + gpio-hog; + gpios = <10 0>; + output-low; + line-name = "DSI_MUX_OE#"; + }; +}; + +&lcdif { + status = "okay"; +}; + +&panel0 { + compatible = "tianma,tm070jvhg33"; + status = "okay"; +}; diff --git a/arch/arm64/boot/dts/freescale/mba8mx.dtsi b/arch/arm64/boot/dts/ freescale/mba8mx.dtsi index c2f0f1a1566c..4b2cca3268eb 100644 --- a/arch/arm64/boot/dts/freescale/mba8mx.dtsi +++ b/arch/arm64/boot/dts/freescale/mba8mx.dtsi @@ -8,6 +8,16 @@ /* TQ-Systems GmbH MBa8Mx baseboard */
/ { + backlight_lvds0: backlight0 { + compatible = "pwm-backlight"; + pwms = <&pwm3 0 5000000>; + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <7>; + power-supply = <®_12v>; + enable-gpios = <&expander2 2 GPIO_ACTIVE_HIGH>; + status = "disabled"; + }; + beeper { compatible = "pwm-beeper"; pwms = <&pwm4 0 250000 0>; @@ -66,12 +76,31 @@ led2: led2 { }; };
+ panel0: panel_lvds0 { + backlight = <&backlight_lvds0>; + status = "disabled"; + + port { + panel_in_lvds0: endpoint { + remote-endpoint = <&lvds_bridge_out>; + }; + }; + }; + pcie0_refclk: pcie0-refclk { compatible = "fixed-clock"; #clock-cells = <0>; clock-frequency = <100000000>; };
+ reg_12v: regulator-12v { + compatible = "regulator-fixed"; + regulator-name = "MBA8MX_12V"; + regulator-min-microvolt = <12000000>; + regulator-max-microvolt = <12000000>; + regulator-always-on; + }; + reg_hub_vbus: regulator-hub-vbus { compatible = "regulator-fixed"; regulator-name = "MBA8MX_HUB_VBUS"; @@ -227,6 +256,27 @@ &i2c3 { scl-gpios = <&gpio5 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; sda-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; status = "okay"; + + dsi_lvds_bridge: dsi-lvds-bridge@2d { + compatible = "ti,sn65dsi83"; + reg = <0x2d>; + enable-gpios = <&expander0 6 GPIO_ACTIVE_HIGH>; + vcc-supply = <®_sn65dsi83_1v8>; + status = "disabled"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@2 { + reg = <2>; + + lvds_bridge_out: endpoint { + remote-endpoint = <&panel_in_lvds0>; + }; + }; + }; + }; };
&pwm3 { --->8---